RESUMO
Solitary thyroid nodule should raise a suspicion of malignancy, which is very common in middle-aged females. Papillary carcinoma thyroid is the most common thyroid malignancy. Warthin-like papillary carcinoma is one of its rare variants. It has a frequent association with Hashimoto's thyroiditis. Here, we report a case of 43-year-old female who presented with swelling in the anterior aspect of neck for 1 month. Fine-needle aspiration cytology features were suggestive of papillary carcinoma thyroid and biopsy confirmed the diagnosis of Warthin-like papillary carcinoma thyroid. This variant is of great clinical and prognostic significance as it carries an excellent prognosis.
Assuntos
Carcinoma Papilar , Neoplasias da Glândula Tireoide , Pessoa de Meia-Idade , Feminino , Humanos , Adulto , Carcinoma Papilar/patologia , Câncer Papilífero da Tireoide/diagnóstico , Neoplasias da Glândula Tireoide/diagnóstico , Neoplasias da Glândula Tireoide/cirurgia , Neoplasias da Glândula Tireoide/complicações , Biópsia por Agulha FinaRESUMO
Uterine mesenchymal tumors are a heterogeneous group of neoplasms that can be diagnostically challenging. Thorough investigations and histopathological findings are highly significant to arrive at the correct diagnosis, thus ensuring appropriate and prompt treatment to the patient. Leiomyosarcoma (LMS) is an uncommon uterine malignancy, which arises from the smooth muscle of the uterine wall. They usually present in postmenopausal women with abnormal uterine bleeding. It follows an aggressive clinical course with an extremely poor prognosis. Surgical management followed by adjuvant chemotherapy is usually the treatment for such cases. Here, we report the case of a 57-year-old menopausal female who presented with a large abdominal swelling that was seen infiltrating the adjacent structures. On resection and histopathological evaluation, a diagnosis of epithelioid LMS was made, which was confirmed by immunohistochemistry.
Assuntos
Leiomiossarcoma , Feminino , Humanos , Pessoa de Meia-Idade , Leiomiossarcoma/diagnóstico , Leiomiossarcoma/terapia , Músculo Liso , Quimioterapia Adjuvante , Menopausa , ÚteroRESUMO
The uncertainty band associated with the transmission curve for 100 kVp x ray in lead was determined using Monte Carlo methods and the sensitivity analysis approach. All uncertainty sources (statistical, systematical and the uncertainties arising from the diversity of x-ray tubes) were taken into account. The transmission of 100 kVp x ray in Syrian building bricks was then computed together with the uncertainty associated with it. Finally, the lead equivalent thicknesses for 10, 15, and 20-cm-thick bricks were estimated. The results are in good agreement with experimental results. This study recommends, as a rule of thumb, to use the lead-equivalent values of 0.5, 0.75, and 1.0 mm for the 10, 15, and 20-cm-thick building bricks, respectively.
Assuntos
Materiais de Construção , Chumbo , Teste de Materiais/métodos , Proteção Radiológica/instrumentação , Proteção Radiológica/métodos , Radiometria/métodos , Espalhamento de Radiação , Modelos Estatísticos , Método de Monte Carlo , Doses de Radiação , Lesões por Radiação/etiologia , Lesões por Radiação/prevenção & controle , Radiografia/efeitos adversos , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , SíriaRESUMO
IAEA Safety Standards require countries to establish and maintain registers of occupational doses. This paper demonstrates a possibility of the use of the regulatory authority information system (RAIS) for this purpose. A two-level classification scheme for work activities, based on UNSCEAR categorisation, is adopted. The implementation approach presented in this paper covers all types of occupational exposure to artificial as well as to natural sources of ionising radiation. Although the presented model is general, it can be adjusted to specific national needs by simply changing certain settings or making use of the extensive RAIS customisation capabilities.
Assuntos
Guias como Assunto , Exposição Ocupacional/normas , Saúde Ocupacional/normas , Doses de Radiação , Proteção Radiológica/normas , Sistema de Registros/normas , Fidelidade a Diretrizes , Humanos , Internacionalidade , Exposição Ocupacional/legislação & jurisprudência , Proteção Radiológica/legislação & jurisprudênciaRESUMO
In this work, the expected neutron and gamma doses in the populated areas outside the newly constructed neutron calibration bunker at the Atomic Energy Commission of Syria will be assessed using the Monte Carlo code MCNP-4C2. The results showed that the maximum ambient dose equivalent rate (neutrons and gammas) outside the bunker would not exceed 0.5 microSv h(-1), assuming an Am-Be neutron source of emission rate of 10(8) n s(-1). The neutron dose is approximately 10 times higher than the photon dose. Sky shine contributes by about 25-50% of the neutron dose and 7-27% of the gamma dose, depending on the location. The simulation uncertainty due to the possible variations in the simulation parameters has been given particular importance.